Where to Buy a Star? An Honest Overview | StarRegistration.net
The depends on whether you are looking for the most recognized novelty service or a truly "legitimate" astronomical name. Scientifically, it is impossible to buy or officially name a star as a consumer. The International Astronomical Union (IAU) is the only body authorized to name celestial objects, and they do not sell these names for commercial purposes.
These companies provide symbolic registration in their own private databases, often including gift kits with certificates and star maps.